This week, "IMPACT x Nightline" reports on the retrial of Karen Read, who is charged with the 2022 murder of her then-boyfriend, Boston police officer John O'Keefe. After a shocking deadlocked jury in Read's first trial that took place in 2024, she is back in court as the second trial begins. ABC News sits down with those close to the case to learn more about what happened that snowy night.

This week, "IMPACT x Nightline" reports on the case of Lori Vallow Daybell, a married former beauty queen and mother who fell for Chad Daybell, a religious leader prepping for the end of the world. As the affair unfolded, their families started dying and disappearing, including two of Lori's children, ages 7 and 16, who were killed in 2019.In 2023, Lori was found guilty of two counts of first-degree murder for killing her two youngest children, and now she is back on trial for the alleged murder of her estranged husband, Charles Vallow, but she maintains her innocence.

Tracy Anderson has been dubbed by many a "secret weapon" in Hollywood. Stars like Gwyneth Paltrow, Jennifer Lopez and more turn to her famed fitness method, but it hasn't been without controversy. "IMPACT x Nightline" goes behind the scenes.

Selena was one of the most celebrated entertainers of her generation, but her life was tragically cut short in 1995 at the age of 23. Now, 30 years after her tragic murder, could her killer be set free? 

Courtney Stodden married actor Doug Hutchison when she was 16 … he was 51. At the time, she said that they were soulmates, but 10 years later, the two divorced. Stodden speaks out against underage marriage, alleging she was groomed by Hutchison.

Denise Richards is back in the spotlight. "IMPACT x Nightline" sits down with the actress and star of "Denise Richards & Her Wild Things" as she tells all about navigating Hollywood, motherhood and reclaiming her signature sexy image via OnlyFans.

"IMPACT x Nightline" reports on rare cases of IVF gone wrong, including a woman suing a fertility clinic after delivering a baby that wasn't biologically hers and a family swapping babies with a nearby couple after an embryo mix-up.

An astonishing attack and an unbelievable motive: How did a sleepover end in attempted murder to please the fictional character Slender Man? "IMPACT x Nightline" unpacks the case after a new court ruling changes everything for one of the assailants.

Kaitlyn Conley was previously convicted of poisoning her ex-boyfriend's mother to death, but in a shocking twist, a New York court overturned her conviction, allowing her to walk free and leaving some to question whether she was wrongfully convicted.

Wendy Williams has broken her silence on her guardianship, challenging her dementia diagnosis and pleading for her independence."IMPACT x Nightline" speaks with Williams and dives deep into her case as her guardian calls for her to be reevaluated.

"IMPACT x Nightline" speaks to industry insiders about the ongoing feud between A-list rappers Kendrick Lamar and Drake, which triggered damning diss tracks and now a lawsuit. Who will reign supreme in this hip-hop battle for the ages?

With all the drama surrounding the blockbuster movie "It Ends with Us," "IMPACT x Nightline" takes a deep dive into the ongoing legal battle between co-stars Blake Lively and Justin Baldoni and their fight in the court of public opinion.

Robin Roberts sits down with music legend Elton John to look back at his life and career. Lady Gaga, Charlie Puth, Brandi Carlile and other artists Elton has mentored and collaborated with share what it is like working with the legendary musician.

Lost tapes and new discoveries in a mysterious car crash that killed Karen Silkwood, a young mother. Silkwood's story fascinated generations, inspiring an Oscar®-nominated film starring Meryl Streep. Was it an accident or something more sinister?

Miss Universe, and its sister pageant Miss USA, have long been the pinnacle of the pageant world, with the ability to launch its queens into the stratosphere. But, recent changes in ownership have caused many to wonder if the crown has lost its luster.

A luxury superyacht sank off the coast of Italy in 16 minutes, sparking global intrigue. Inside the final moments of the Bayesian, one of the rarest sailing yachts in the world owned by billionaire Mike Lynch, told through many exclusive interviews.

Murdered in broad daylight, everyone wants to know what happened to teenagers Abby Williams and Libby German. Who is the Delphi killer? "IMPACT x Nightline" goes inside the trial of the man charged with their brutal deaths.

When news broke that Graceland would be foreclosed, fans were shocked. Could it be possible? Through new interviews with those closely connected with the iconic Presley family landmark and untold stories from actress Riley Keough's new memoir detailing her mother's, Lisa Marie Presley, experience growing up there, "IMPACT x Nightline" takes viewers inside Graceland to investigate the shocking alleged foreclosure scheme that many worried had a chance to succeed.

Drugs, a trashed hotel room, and a deadly fall: How One Direction's Liam Payne tragically died. The boy band singer's sudden death sparked renewed questions about the dark side of fame. How did the 31-year-old's brilliant star fade so dramatically?

They killed their parents- but now there's a push to free them. New evidence and a re-examination of the Menendez family's alleged dark secrets are giving the brothers newfound support.

Mary J. Blige. Cher. Dave Matthews. Dionne Warwick. What do they have in common? They're all being inducted into the Rock & Roll Hall of Fame this year. IMPACT explores the evolution of one of the music industry's most prestigious honors.

The Blind Side made Michael Oher famous. Now, the former NFL player claims that he was blindsided by the family that took him in. How did such a feel-good story end up mired in a contentious legal battle?

When a young singer disappears, her family, police and a woman with a prophetic vision launch an urgent search, but it's a set of keys that unlocks the answers.

Susan Smith drowned her two young boys, then falsely accused a Black man of carjacking and kidnapping them. Thirty years later, she's now eligible for parole. Despite Smith's crimes and bad behavior behind bars, could she walk free?

After the sudden death of beloved actor Matthew Perry, a web of drug dealing and greed is revealed. Five people now arrested and charged in his death. We take you inside the world of ketamine and the final days of Perry's life.